# Example application -- tkwidget_print.py
#
# Jochim Thöne July 2003 JoachimThoene@web.de
#---------------------------------------------------------------------------------------------------------
# Paper printing of a Tkinter widget in WIN32 enviroment
# 
# Requirements: 
# Python, Tkinter, Python Win32 Extensions and Python Imaging Library (version => 1.1.4)
#
#---------------------------------------------------------------------------------------------------------      
# 
# This example application uses:
#
#       Python
#                                    Copyright © 2001, 2002 Python Software Foundation.
#                                    All Rights Reserved.
#
#       The Python Imaging Library 
#                                    Copyright © 1997-2002 by Secret Labs AB
#                                    Copyright © 1995-2002 by Fredrik Lundh
#
#       Python for Win32 Extensions 
#                                    Copyright © 1994-2001 Mark Hammond (mhammond@skippinet.com.au)
#
#---------------------------------------------------------------------------------------------------------     
# Note
# This application is only a first try of paper printing a tkinter widget. The PIL library contains many
# possibilities to improve the paperprints output quality by handling the grabbed input image with PIL.
# Also the paperdesign could be improved using Win32 Extensions(for Example: where to place the image on 
# the sheet).
----------------------------------------------------------------------------------------------------------

from Tkinter import *
import Image, ImageWin, ImageGrab
import os
import win32ui
import win32print
import win32con

# funtion to grab the widget and return a bitmap object 

def grabwidget(widget):
    x = widget.winfo_rootx()
    y = widget.winfo_rooty()
    w = widget.winfo_width()
    h = widget.winfo_height()
    print x, y, w, h
    return ImageGrab.grab((x+2, y+2, x+w-2, y+h-2)) # +2 and -2 to avoid printing 
                                                    # the widgets border
    
# grabs widget and stores it as a file     
    
def print_file():
    text.update()
    image = grabwidget(text)
    image.save("widget.bmp")
    
# grabs widget, converts it to a Dib object and sends it to the 
# systems standard printer
    
def print_text():
    text.update()
    text.update_idletasks()
    image = grabwidget(text)
    image.save("tmp.bmp")
    
    # Creates a Dib instance from grabbed file
    
    im = Image.open("tmp.bmp")
    dib = ImageWin.Dib('RGB',im.size)
    dib.paste(im,None)
    imagesize = (im.size[0]*10, im.size[1]*10) 
    
    # Sends the dib to the windows standard printer
    
    printer = win32print.GetDefaultPrinter()
    print printer
    phandle = win32print.OpenPrinter(printer)
    dc = win32ui.CreateDC()
    dc.CreatePrinterDC()
    dc.StartDoc(im.filename)
    dc.StartPage()
    dib.draw(dc.GetHandleAttrib(), (0, 0) + imagesize)  # output size can be changed  
    dc.EndPage()                                        # by modifying the im.size tuple                                                   
    dc.EndDoc()
    win32print.ClosePrinter(phandle)
    del dc
    del im
    os.unlink("tmp.bmp")
    
# This terminates the application

def close_all():
    root.quit()

# Simple text widget with 3 buttons

root = Tk()
frame = Frame(root)
frame.pack()

text = Text(frame,width = 50, height = 30, bg = "white")
text.pack()

button = Button(frame,text = "Bitmap to File", command = print_file)
button.pack(side = LEFT, expand = "yes", fill = X)

button1 = Button(frame,text = "Bitmap to Printer", command = print_text)
button1.pack(side = LEFT, expand = "yes", fill = X)

button2 = Button(frame,text = "Exit", command = close_all)
button2.pack(side = LEFT, expand = "yes", fill = X)

root.mainloop()